SMARC sXAL User Guide. Rev. 1.0
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6.3.
Fan Connector
The FANSYS (SYS_FAN) can be used to power, control and monitor a fan for chassis ventilation etc.
The three-pin header is recommended to be used for driving three-wire type Fan in order to implement Fan speed
control.
Figure 8: 3-pin Fan Connector
Pin
Signal
Description
Type
1
PWM
Fan speed sense
O
2
PWR
Power +5 V
PWR
3
GND
Ground
PWR
Signal
Description
Type
GND
Power Supply GND signal
PWR
PWR
+5 V supply for fan
PWR
PWM
PWM output signal for Fan speed control.
O